新疆农业大学学报2026，Vol.49Issue(2)：138-145,8.DOI:10.20088/j.cnki.jxau.2026.02.006
种子休眠、NaCl、干旱及埋深对雀麦种子萌发的影响
Effects of Seed Dormancy,NaCl,Drought and Burial Depth on Germination of Bromus japonicus Seeds
摘要
Abstract
In order to explore the effects of different abiotic stresses on the seed germination of Bromus japonicus,this study took Bromus japonicus as the research object and conducted germination experiments to investigate the dormancy characteristics of its seeds,as well as the impacts of salt,drought and burial depth on seed germination,and to compare the relationship between different burial depths and seed germi-nation and seedling emergence.The results showed that newly matured seeds of Bromus japonicus exhibi-ted dormancy.GA3 and indoor dry storage significantly promoted seed germination(P<0.05),indicating that the seeds had post-ripening characteristics and belonged to non-deep physiological dormancy.NaCl stress significantly inhibited the seed germination of Bromus japonicus.The germination rate of seeds was only 23%at a NaCl concentration of 0.1 mol/L and no germination was observed at concentrations above 0.2 mol/L.There was no significant correlation between the recovery germination rate of seeds after rehy-dration and NaCl concentration.Drought stress simulated by 10%PEG-6000 also significantly inhibited seed germination,and no germination occurred at PEG-6000 concentrations above 15%.The recovery ger-mination rate after rehydration decreased with the intensification of drought stress.Burial depth had a significant effect on seed germination and seedling emergence of Bromus japonicus.Seeds could germinate at burial depths ranging from 0 to 8 cm,while seedling emergence only occurred at depths from 0 to 4 cm.Within the burial depth range of 0-4 cm,the seedling emergence rate decreased with the increase of burial depth,with the highest emergence rate(80%)recorded at 0 cm burial depth.No seedling emergence was ob-served at burial depths≥6 cm.At burial depths of 0-1 cm,the seed germination rate was equal to the seedling emergence rate;at depths above 2 cm,the seed germination rate was higher than the seedling e-mergence rate;at burial depths≥6 cm,seeds still germinated but failed to emerge from the soil.Both seed germination rate and seedling emergence rate were negatively correlated with burial depth.The dor-mancy characteristics of Bromus japonicus and its survival strategies under different NaCl,drought and burial depth conditions reflect its adaptive mechanisms in extreme environments,which ensure the popula-tion renewal of Bromus japonicus.关键词
雀麦/种子萌发/种子休眠/非生物胁迫Key words
Bromus japonicus/seed germination/seed dormancy/abiotic stress分类
农业科技引用本文复制引用
罗霄,王海艳,魏岩..种子休眠、NaCl、干旱及埋深对雀麦种子萌发的影响[J].新疆农业大学学报,2026,49(2):138-145,8.基金项目
国家自然科学基金项目(31560113) （31560113）
